Adding observer functionality to UINetworkQualityService

net/nqe/network_quality_estimator.h

Index: net/nqe/network_quality_estimator.h
diff --git a/net/nqe/network_quality_estimator.h b/net/nqe/network_quality_estimator.h
index cb2ec31e6fed82cea8d8d760ebb06705a3a17d20..f1cb34844ee6834a9520d26de63c50fbeeaa00f6 100644
--- a/net/nqe/network_quality_estimator.h
+++ b/net/nqe/network_quality_estimator.h
@@ -149,20 +149,28 @@ class NET_EXPORT NetworkQualityEstimator
    private:
     DISALLOW_COPY_AND_ASSIGN(ThroughputObserver);
   };
 
   // Provides simple interface to obtain the effective connection type.
   class NET_EXPORT NetworkQualityProvider {
    public:
     // Returns the current effective connection type.
     virtual EffectiveConnectionType GetEffectiveConnectionType() const = 0;
 
+    // Adds |observer| to a list of effective connection type observers.
+    virtual void AddEffectiveConnectionTypeObserver(
+        EffectiveConnectionTypeObserver* observer) = 0;
+
+    // Removes |observer| from a list of effective connection type observers.
+    virtual void RemoveEffectiveConnectionTypeObserver(
+        EffectiveConnectionTypeObserver* observer) = 0;
+
     virtual ~NetworkQualityProvider() {}
 
    protected:
     NetworkQualityProvider() {}
 
    private:
     DISALLOW_COPY_AND_ASSIGN(NetworkQualityProvider);
   };
 
   // Creates a new NetworkQualityEstimator.